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fix(profiling): use SGD for pi0/pi05/pi0_fast and free CUDA cache after deterministic forward

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Adam optimizer states (exp_avg + exp_avg_sq) require ~16GB extra on top of
model params and gradients for 4B parameter models, exceeding the 22GB GPU.
SGD has zero optimizer state overhead and profiling only measures
forward/backward timing anyway.

Also adds torch.cuda.empty_cache() after deterministic forward to release
transient memory before the training loop starts.

Made-with: Cursor
This commit is contained in:
Pepijn
2026-04-16 16:09:56 +02:00
parent b1e16783de
commit da7da741f1
2 changed files with 32 additions and 0 deletions
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profiling/model_profiling_specs.json
+30
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@@ -63,6 +63,16 @@
"--policy.use_amp=true",
"--policy.gradient_checkpointing=true",
"--batch_size=1",
"--use_policy_training_preset=false",
"--optimizer.type=sgd",
"--optimizer.lr=1e-5",
"--optimizer.weight_decay=0",
"--optimizer.grad_clip_norm=1.0",
"--scheduler.type=cosine_decay_with_warmup",
"--scheduler.peak_lr=1e-5",
"--scheduler.decay_lr=1e-6",
"--scheduler.num_warmup_steps=0",
"--scheduler.num_decay_steps=12",
"--rename_map={\"observation.images.front\": \"observation.images.base_0_rgb\", \"observation.images.wrist\": \"observation.images.left_wrist_0_rgb\"}"
]
},
@@ -78,6 +88,16 @@
"--policy.use_amp=true",
"--policy.gradient_checkpointing=true",
"--batch_size=1",
"--use_policy_training_preset=false",
"--optimizer.type=sgd",
"--optimizer.lr=1e-5",
"--optimizer.weight_decay=0",
"--optimizer.grad_clip_norm=1.0",
"--scheduler.type=cosine_decay_with_warmup",
"--scheduler.peak_lr=1e-5",
"--scheduler.decay_lr=1e-6",
"--scheduler.num_warmup_steps=0",
"--scheduler.num_decay_steps=12",
"--rename_map={\"observation.images.front\": \"observation.images.base_0_rgb\", \"observation.images.wrist\": \"observation.images.left_wrist_0_rgb\"}"
]
},
@@ -93,6 +113,16 @@
"--policy.use_amp=true",
"--policy.gradient_checkpointing=true",
"--batch_size=1",
"--use_policy_training_preset=false",
"--optimizer.type=sgd",
"--optimizer.lr=1e-5",
"--optimizer.weight_decay=0",
"--optimizer.grad_clip_norm=1.0",
"--scheduler.type=cosine_decay_with_warmup",
"--scheduler.peak_lr=1e-5",
"--scheduler.decay_lr=1e-6",
"--scheduler.num_warmup_steps=0",
"--scheduler.num_decay_steps=12",
"--policy.normalization_mapping={\"ACTION\": \"MEAN_STD\", \"STATE\": \"MEAN_STD\", \"VISUAL\": \"IDENTITY\"}",
"--rename_map={\"observation.images.front\": \"observation.images.base_0_rgb\", \"observation.images.wrist\": \"observation.images.left_wrist_0_rgb\"}"
]